Thermal Decomposition of Sodium Hydrogen Carbonate and Textural Features of Its Calcines

0394854 - ÚCHP 2014 RIV US eng J - Journal Article
Hartman, Miloslav - Svoboda, Karel - Pohořelý, Michael - Šyc, Michal
Thermal Decomposition of Sodium Hydrogen Carbonate and Textural Features of Its Calcines.
Industrial and Engineering Chemistry Research. Roč. 52, č. 31 (2013), s. 10619-10626. ISSN 0888-5885
R&D Projects: GA MŠMT(CZ) 7C11009
Grant - others:RFCS(XE) RFCR-CT-2010-00009
Institutional support: RVO:67985858
Keywords : thermal decomposition * sodium hydrogen carbonate * sodium bicarbonate
Subject RIV: CI - Industrial Chemistry, Chemical Engineering
Impact factor: 2.235, year: 2013

The decomposition rate of sodium hydrogen carbonate (NaHCO3) into carbonate (Na2CO3) was determined as weight loss at ambient pressure and elevated temperatures up to 230 °C. A particularly slow increasing-temperature procedure and small samples of fine powders were employed to minimize heat and mass transfer intrusions. Efficient removal of the gaseous products eliminated possible equilibrium constraints. A near-first-order reaction rate equation has been presented for the decomposition reaction and also verified by the data collected by experiment in a constant-temperature mode. This correlation makes it possible to predict the reaction rate as a function of temperature and the extent of decomposition. In combination with its integrated form, it can readily be used, for example, in modeling or design of the decomposition proces.
Permanent Link: http://hdl.handle.net/11104/0223038